1. 1st divide to half take the heavier out D! L; |7 h/ v8 I8 b: nTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2. 2nd take 4 balls out of 5 divide 2 groups to get the heavier out. (if is equal thn the remain is the one u looking for) & O0 t$ t' p0 _3. Same method if is not equal on 2nd try.